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CVE-2026-56384

Craft CMS - Missing Authorization in assets/preview-thumb Endpoint PUBLISHED

Description (CNA)

Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a target private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that private asset, because no asset-view permission check is performed before preview generation. This affects versions >= 4.0.0-RC1, <= 4.17.7 and >= 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14.

Affected (CNA)

Vendor / productVersions
craftcms / cmsaffected 4.0.0-RC1 before 4.17.8; unaffected 4.17.8; affected 5.0.0-RC1 before 5.9.14; unaffected 5.9.14

CWE

CWE-862

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.